Bladt Industries Semco CVOW Substation

First Coastal Virginia Offshore Substation Arrives in Denmark

The first of three 880 MW offshore substations being built for Dominion Energy’s Coastal Virginia Offshore Wind (CVOW) project has arrived at the Bladt Industries production site in Aalborg, Denmark, for outfitting from a prefabrication site in Spain.

Bladt Industries Semco CVOW Substation

In 2021, a consortium comprising Semco Maritime and Bladt Industries was awarded a contract for the supply of three substations for the 2.6 GW CVOW offshore wind project in the US.

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Denmark-headquartered Bladt Industries is responsible for the design, procurement, and manufacturing of the steel structures and jacket foundations for the substations, while the design, procurement, and installation of electrical equipment, energy systems, and inter-array cables will be managed by Semco Maritime.

Along with the substations’ steel structures and foundations, Bladt will also deliver the transition pieces (TPs) for the offshore wind farm’s wind turbine foundations under a separate contract secured with the developer.

When it is done, each 880 MW offshore substation will weigh 3,800 tonnes, not including the jacket foundations or the pin piles.

As previously reported, Dominion Energy selected the consortium of DEME Group and Prysmian as the Balance of Plant (BoP) contractors for the transportation and installation of the foundations and the substations and the engineering, procurement, construction, and installation (EPCI) services for the inter-array and export cables for the project.

DEME Offshore will oversee the complete offshore installation works for the foundations, substations, and infield cables, as well as part of the export cables.

Prysmian Group will provide the export cables and 320 kilometres of 3-core 66 kV offshore inter-array cables with XLPE insulation for the wind farm.


The CVOW project will comprise 176 Siemens Gamesa 14 MW wind turbines and three offshore substations in the 112,800-acre commercial lease area located 27 miles (about 43 kilometres) off the Virginia Beach coast.

Construction and fabrication activities are already underway, with the monopile foundations arriving at the Portsmouth Marine Terminal in Virginia. The installation of foundations and wind turbines is scheduled to begin in 2024.

Once fully constructed in 2026, the 2.6 GW offshore wind farm will be able to generate enough electricity to power up to 660,000 households.


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